Desulfurizing mix

Details Desulfurizing mix Desulfurizing mix

1998-05-26

1999-10-26

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Compositions

Solid treating composition for liquid metal or charge

C21C 7064

Patent

active

059720727

ABSTRACT:
A desulfurization composition contains from about 3% to about 20% particulate metallic aluminum, about 5% to about 30% particulate alumina, about 0.5% to about 12% particulate hydrocarbon material or other gas generating composition and the balance lime plus impurities. Preferably aluminum dross is the source of aluminum and alumina. The desulfurization composition is injected into molten iron from a blast furnace preferably in an amount of 4 to 20 pounds desulfurizer per ton of hot metal. The desulfurizing composition can be injected as a blend or co-injected into the hot metal through a lance using a carrier gas or dumped into the hot metal as it is being poured into the ladle. At least for torpedo ladles, the desulfurization composition can be placed in the ladle before the hot metal is poured into it.

REFERENCES:
patent: 3876421 (1975-04-01), Takemura
patent: 4014684 (1977-03-01), Jones et al.
patent: 4142887 (1979-03-01), Luyckx
patent: 4266969 (1981-05-01), Koros
patent: 4274869 (1981-06-01), Kristianson et al.
patent: 4374664 (1983-02-01), Mitsuo
patent: 4708737 (1987-11-01), Skach, Jr. et al.
patent: 4764211 (1988-08-01), Meichsner et al.
patent: 5021086 (1991-06-01), Luyckx
patent: 5284504 (1994-02-01), Barker et al.
patent: 5366539 (1994-11-01), Abele et al.
patent: 5397379 (1995-03-01), Barker et al.
Goran Carlsson et al., "Lime injection desulfurization of hot metal-optimizing parameters of alumium addition," Scandinavian Journal of Metals, Sep. 1996, pp. 50-56.
H. T. Kossler et al., "Development of Lime Based Hot Metal Desulfurization at J&L", McMaster Sym., No. 11 (1983).
Tosiharu Mitsuo et al., "Improvement of Desulfurization by Addition of Alumina to Hot Metal in the Lime Injection Process," Transactions of the Japan Institute of Metals, vol. 23, No. 12 (1982), pp. 768-779.

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